Understand multiple Apple Health sources
Multiple sources can add useful records to your Health history. They can also explain a changed trend after switching devices or a workout appearing more than once. What matters is the category you are looking at, the source that wrote each entry and how the app you use processes those records.
Check each category separately
One source may provide sleep, another workouts and another body weight. That is not a contradiction. In Apple Health, open the category you are investigating and look at its sources and individual entries. Compare dates and time periods as well as app names. A list of connected apps does not tell you which source contributed a specific reading.
Distinguish Health priority from app calculations
Apple Health lets you set the order of data sources for each category. That order determines how Health itself shows totals and charts. Other apps often read the individual entries directly and calculate their own metrics. Changing the source order therefore does not guarantee that every recovery app shows the same value.
LeibFit does not filter night values by device. HRV, resting heart rate and sleep count equally from any wearable that writes them to Health. The upside: you do not need to change anything when you switch watches. The consequence: if two devices write data for the same night, both go into the calculation.
Sleep works best from one source
Your trend is clearest when exactly one source writes sleep to Health each night. If you wear a watch and a ring at the same time, or also run a sleep app on your iPhone, turn off writing sleep data to Health for the sources you do not need. You can do that in each app's Health settings or in Apple Health under Profile > Apps.
LeibFit has a separate path for the Amazfit Helio Strap: the app reads the band directly via Bluetooth. You choose in the app whether recovery takes its night values from the watch or from the band. Only one of the two counts at a time, because watch and band calculate HRV differently (see SDNN vs RMSSD). When you switch to the band, LeibFit needs seven nights from the band before it scores recovery with it. The band writes to Health only for nights that no other device has filled yet.
Understand duplicate workouts
If several apps wrote the same session, inspect the entries before deleting anything. Decide which app should record the workout and which should only read it, then turn off the second write path in that app's settings. Keep your history until you understand what caused the overlap.
In LeibFit, a workout entered twice does not double your strain. Strain comes from the day's heart-rate data, not from the number of workout entries. The app also merges duplicate runs that overlap almost completely into one.
Keep a note of changes
Record when you started using another device or app. That helps you tell a change in recording from a real change in your trend. What to watch for when moving to a new watch is covered in New wearable: compare the HRV trend carefully. If records go missing after a switch, Missing Apple Health data helps narrow it down.
Frequently asked questions
Is another source always a problem?
No. It may provide categories you would otherwise miss. What matters is that it is clear which source writes each category.
Should I remove every old source?
No. Inspect the actual entries and write paths first. Older entries are useful for comparing with earlier weeks. Usually it is enough that an app you no longer use stops writing new data.
Sources
- Apple Support: Manage health data on your iPhone